A privilege escalation flaw was found in the way Plone, a user friendly and powerful content management system, enforced authorization for users having administrator privilege access for a subtree of a particular node (access to node above that subtree was granted even when the user in question has had administrator privilege only for a subtree of that node). A remote attacker, with administrator user privilege to certain subtree of Plone actions / functionality, could use this flaw to access / alter also higher nodes.